Burring machine



Aug 8, 1944' 'v R. G. cUDlNl 2,355,601

BURRING MACHINE Filed Mar-Ch 22, 1944 3 Sheets-Sheet 1 INVENTOR. mier 6.' 6' Ji/1a'.

Aug.'s, 1944. f R. G. CUDINI 2,355,601

I BURRING MACHINE Filed March 22, 1944 3 sheds-sheet 2 I INVENTOR. /0 jager' f aaznz.

Aug. 8,1944. R. G. cuDlNl BURRING MACHINE 5 sheets-Sheet s Filed Mah 22, 1944 M WIA ma 74u HTToF/VEVS.

Patented Aug. 8, 1944 UNITED STATS FATENT OFFICE BURRlNG MAGHINE Roger G. Cudini, Birmingham, Mich. Application March 22, 1944, Serial No. 527,611

(Cl. 2li- 33) Claims.

The present invention relates to a. burring machine and particularly relates to a machine of that type which is intended for use in removing burrs from elongated lmetal articles, such as strips of continuous hinge parts.

The primary object of the present invention is `to provide improvements in machines of the type mentioned whereby the burrs formed in the manufacture of elongated hinge parts may be quickly and accurately removed.

Other objects of the invention Will become apparent from the following specication, the drawings relating thereto, andv from the claims hereinafter set forth.

VIn the drawings, in which like numerals refer to like parts in the different views throughout,

Figure 1 is a partial, perspective View ofa portion of the machine of the present invention, with the direction oi the passage of the article through: the machine indicated by the arrows;

Fig, 2 is a side elevational view of the apparatus shownin Fig. l, taken from the right side thereof;

Fig. 3 is an enlarged, cross-sectional View taken substantially along the line 3--3 of Fig. 2;

Fig. 4 is a plan and cross-sectional view taken substantially along the line 4--4 of Fig. 3;

Fig. 5 is a side elevational View of the apparatus shown in Fig. 1 taken from the left side thereof;

Fig 6 is an enlarged, cross-sectional View taken substantially along the line 6 6 of Fig. 5;

Fig. 'l is a perspective view vof a portion of the 'hinge part and illustrating the burrs thereon;

Fig. 8 is a view similar to Fig. 7 and illustrating the nished hinge part.

The apparatus of the present invention is particularly designed to remove burrs which are formed on the elongated hinge parts during the manufacture thereof by the methods disclosed in) the United States patent to Moynahan, et al. No.

2,288,013, granted June 30, 1942. Such hinge parts are formed of elongated metal elements having a main body portion l0 and a bead I2 along one edge thereof. In the formation of thel bead, a perforation or aperture is provided therethrough. Segments of the perforated bead are cut away to leave perforated projections which may be interfltted with those of a cooperating strip. It is during the cutting away of these segments that the burrs I6 are left on the strip.

The machine of the present invention comprises a supporting standard generally in the form of a. table frame, generally indicated at i9 and having a longitudinally extending bottom support-member upon which the bottom edge f of the hinge element rests. Longitudinally extending guide members 22 are mounted on the support I9 and are spaced from each other so that with the bottom members they form a guide channel within which the lower edge of the major portion It of the strip is received and engaged as it moves through the machine. The strip is so positioned that the bead is disposed upwardly and as the strip is moved through the machine, it is rst engaged by a cutter 24 which engages the one side of the strip to remove the burrs along the bottom edges of the segments. The strip is then engaged by an abrasive stone 26 which has a contour complementary to that of the top of the bead to remove the burr along the top portion, As the strip moves further along the machine, it is engaged by another abrasive stone 28 which has a shape to engage a portion of the top and a portion of the side of the bead and along the edge of.

the segment to remove those portions of the burrs.

The strips are passed through the machine in the direction indicated by the arrows in Figs. 1, 2, and 5 and are moved through by hand tools indicated by broken lines 30 and 32 in Fig. 2. The leading edge of the strip may be positioned in the guide groove and one of the notches is engaged by the hand tool 30 as shown in Fig. 2 and such strip may then be pushed into and partially through the machine. As such leading edge passes beyond the other side ofthe machine, a notch on the workpiece may be engaged by hand tool 32 and pulled through the machine.

As mentioned above, the work strip is rst engaged by the cutter 24 which is mounted in a holder 34 by means of a set screw 33. The holder 34 may be suitably mounted on the support in such a position that the cutter 24 is slidably mounted in a recess therein and may be so positioned that the cutting edge 33 of the cutter engages the adjacent side of the work strip. The work strip is resiliently urged against the cutter by means of a block 4G which ismounted on the end of a push rod 42 so that the face of the block 4l) engages the opposite side of the work strip as shown in Fig. 3. Such rod 42 may be slidably received through a horizontal aperture 44 provided in a holder 46 which may be also mounted on the support. The block 4D is resiliently urged against the workpiece by means of a coil spring 48 which embraces rod 42 and has one end bearing against the block 43 and the opposite end bearing against a portion of the holder 4S. The outer end of the rod 42 has a handle 56 formed .thereon so that the block 40 may be withdrawn -parts of the main supporting structure I9. -member 60 is formed with vertical slots ad- .the top surface of housing 50. Vis passed through the bight of the U so that it to permit starting of a work strip through the machine. As the strip passes through the machine, the block 40 resiliently bears thereagainst to urge the opposite side into engagement with the cutting edge 38 of the cutter.

After portionsy of the workpiece have passed the cutter, they are engaged along the top surface by the abrasive stone 26. This stone 26 is mounted within a recess formed in a mounting housing 52 and may be removably xed therein so that blocks of other contours may be inserted or the stone may be removed for the insertion of a new one after the rst one is worn out. The housing 50 is pivotally connected to a pivot link 52 by means of a pivot pin 54. The opposite end of the link 52 is pivotally connected to an upstanding bracket 56 by means of a pivot pin 58. 'I'he bracket 56 is xed to a mounting member 60, which in turn is adjustably mounted to upstanding frame members 62 and 64 which form rlhe adjusted. lIn order to provide for a resilient engagement of the stone 26 with the top surface of the workpiece, a U-shaped strap 'l0 is fixed to the housing 50 so that the link 52 passes therethrough. A coil spring 'l2 is positioned within the member so that one end thereof resiliently supports the link 52 and the other end thereof bears against A set screw 'I4 engages the upper edge of the link 52 to adjust the eiective pressure of spring 12.

Another U-shaped strap 16 is iixed to member 60 with the link 52 passing therethrough. A coil .spring 18 is positioned within member 'l5 so that 'top surface of the workpiece, against the action of spring 12. In some instances, the spring 18 vmay be dispensed with and the weight of the stone and its mounting means will cause it to move downwardly against the action of spring l2 and resiliently against the top surface of the workpiece. As the work strip passes under stone 26, it is engaged as shown in Fig. 3. The mounting for plate 60 and the adjustment of the springs will permit adjustment of the stone with respect to the work. Furthermore, the mount'ng for the stone 26 on the pivot arm will permit its readily adjusting itself to the contour of the work strip as it passes therethrough.

After passing by stone 26, the work strip is engaged along the side having the burrs thereon or the same side as cutter 24 by the stone 2S, as best shown in Fig. 6. The workpiece fs held Aagainst the stone 28 by means of a backing plate 90 which is mounted on the main supporting frame and which has an integral depending por- -tion formed with vertically extending slots 92.

Clamping screws 94 are received through the vertical slots and are threaded into the supporting member 20 which is xed to the main supporting frame. Thus, the backing member 00 may be vertically adjustedso as to accommodate it to different size workpieces.

The stone 28 is mounted so that it may be adjusted toward and from the workpiece, so that it is resiliently urged about a pivot pin toward the workpiece and so that it may be vertically adjusted for different size workpieces.

The stone 28 is removably mounted within a recess |00 of a housing |02. Such stone may be fixed therein by means of a set screw or the like and may be readily removed for the insertion of another stone. The housing |02 is fixed to a plate |04 which passes under an upwardly offset member |06 which is xed, by welding or the like, to one end of an elongated pivot arm |08 (Fig. 5). The plate |04 is pivotally connected to the upwardly oiest member |06 by means of a pivot bolt ||0. The member I 06 has a pair of upstanding ears ||2 formed thereon, each of which threadably receives therethrough a set screw ||4. The inner ends of the set screws I4 abut against the back surface of housing |02. By adjusting the set screws ||4, the housing |02, together with stone 28, may be adjustably pivoted about pivot ||0 so that the stone 28 may be adjusted with respect to the work.

The arm |08 is pivotally connected to a supporting plate ||6 by means of a pivot The inner end of member ||6 is disposed under plate |04 and is xed to a mounting member ||8. The mounting member ||8 includes upstanding plate members and upper and lower horizontal members so that it is generally in the form of a box I-section. Such horizontal plates are indicated at |20.

The arm |08, together with the upwardly offset portion |06, is resiliently urged toward the Work by means of a coil spring |22. One end of the coil spring |22 is received over a projection |24 formed on the rear edge of offset portion |06; and the opposite end is received over a projection |26 formed on the inner end of an adjusting rod |28. The rod |28 is received through a mounting bracket |30, mounted on the top surface of horizontal member |20. A set screw |32 is threaded through member |30 and engages rod |28 sc that the rod |28 may be adjusted to vary the spring tension of spring |22. It will thus be seen that since member |30 is fixed to the mounting'member ||8 that the arm |08 is resiliently urged toward the Work about pivot Housing |02, which holds stone 28, is fixed to the oiset portion |06 so that the stone 28 is resiliently urgedagainst the Work to remove burrs therefrom as the Work is passed thereby.

The member I8, including horizontal members |20, is mounted to a U-shaped strap |34. The member ||8 is slidably disposed thereon so that the vertical members bearing against the inner sides of the strap and the flanges of the top horizontal members |20 slidably engage the upper edges of strap |34. Member |04 slidably rests on top of upper member |20. Member Il may be adjusted toward and away from the Work by means of a rod |36 which extends through a tubular member |38 mounted on the outer end of strap |34. A set screw |40 is threadably mounted on tube |38 and is adapted to engage the rod |36 to hold it in its adjusted position. By loosening the set screw |40, the rod |36 may be pulled in and out to slide the member ||8, which serves as the support for the stone mounting mechanism, so that such mechanism may be adjusted toward and from the work to accommodate the stone to different size workpieces.

The strip |34 has a depending portion |42 which is pivotally connected to avertical slide |44 by means of a pivot |46. The entire mounting mechanism for stone 28, including strap |34 and mounting member ||8, may thus be pivoted about shaft |46 to move the stone away from the work. The slide |44 is formed with a slot |48 through which a clamping screw |50 is received. The clamping screw |50 is threadably mounted to a depending bracket |52 which is xedly connected to the main support. The bracket |52 has a horizontal bottom flange |54 through which an adjusting screw |56 is threaded. The upper end of adjusting screw |56 abuts against the bottom of slide |44. Thus, by loosening clamp |50 and turning screw |56, the slide |44, togetherl with all of the mounting mechanisms for stone 2B may be vertically adjusted. The slide |44 may then be clamped in its adjusted position by tightening clamp |50.

In the operation of the machine above described, the work strip is inserted in the guideways and is then pushed and pulled through by the hand tools 30 and 32. `The workpiece passes the cutter 24 which removes certain of the burred portions and thereafter passes by stones and 28 in engagement therewith to remove the remaining burred portions. An air jet may be directed against the work adjacent the cutter 24 through an air tube |50 so as to clear the work, at this region, of the metal removed by the cutter.

Formal changes may be made in the embodiment of the invention without departing from the spirit and substance of the invention, the scope of which is commensurate with the appended claims.

What is claimed is:

1. A machine' for removing the burrs on an elongated Imetal article comprising a support, guide means on said support for supporting and guiding said article as it moves along said support, a cutter mounted on said support and positioned to engage one side of said article, an abrasive member mounted on said support and positioned to engage the top surface of said article, another abrasive member mounted on said support and positioned to engage said one side of said article, and means holding said article in engagement with said cutter and said abrading members.

2. A machine for removing the burrs on an elongated metal article comprising a support, guide means on said support for supporting and guiding saidv article as it moves along said support, a cutter mounted on said support and positioned to engage one side of said article, means resiliently urging said article into engagement with said cutter, an abrasive member mounted on said support and positioned to engage the top surface of said article, anotherabrasive member mounted on said support and positioned to engage said one side of said article, and means resiliently urging said abrasive members into engagement with said article.

3. A machine for removing the burrs on an elongated metal article comprising a support, guide means on said support for supporting and guiding said article as it moves along said support, a cutter mounted on said support and positioned to engage one side of said article, means resiliently urging said article into engagement with said cutter, an abrasive member disposed above said support and positioned to engage the top surface of said article, means pivotally mounting said member for movement toward and away from said article, means resiliently urging said member into engagement with said article, another abrasive member on said support and positioned to engage said one side of said article, means pivotally mounting said member for movement toward and away from said article and means resiliently urging said another member into engagement with said article.

4. A machine for removing the burrs on an elongated metal article comprising a support, guide means on said support for supporting and guiding said article as it moves along said support, a cutter mounted on said support and positioned to engage one side of said article, means resiliently urging said article into engagement with said cutter, an abrasive member disposed above said support and positioned to engage the top surface of said article, means pivotally mounting said member for movement toward and away from said article, means resiliently urging said member into engagement with said article, means adjustably positioning said mounting means with respect to said article, another abrasvie member on said support and positioned to engage said one side of said article, means pivotally mounting said member for movement toward and away from said article and means resiliently urging said another member into engagement with said article, and means adjustably positioning said last named mounting means with respect to said article.

5. A machine for removing the burrs on an elongated metal article comprising a support, guide means on said support for supporting and guiding said article as it moves along said support, a cutter mounted on said support and positioned to engage one side of said article, means resiliently urging said article into engagement with said cutter, an abrasive member disposed above said support and positioned to engage the top surface of said article and havingl a contour complementary to that of the adjacent surface of said article, means pivotally mounting said member for movement toward and away from said article, means resiliently urging said member into engagement with said article, another abrasive member on said support and positioned to engage said one side of said article and having a contour complementary to that of the adjacent surface of said article, means pivotally mounting said member for movement toward and away from said article and means resiliently urging said another member into engagement with said article.

ROGER G. CUDINI. 

